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Problem 15 - Entrance Test

If the mode of the data 5, 6, 6, 8, x, 5, 7, 6 is 6, then x cannot be

Correct: B

Mode is 6, so 6 must occur most. If x = 5, then 5 occurs thrice and 6 occurs thrice, so mode not uniquely 6. Hence x cannot be 5.